There is a hazardous materials release threatening life and the environment. An sour gas pipeline rupture has caused a release of H2S in the Town of Turner Valley. Residents are ordered to protect in place. Emergency crews have evacuated the affected areas and will continue to monitor.

TURNER VALLEY, Alta. -- The flow of sour gas through a ruptured pipeline in southern Alberta was turned off Thursday, but a small amount of the deadly sour gas was still seeping into floodwaters submerging the line.

Pipeline owner Legacy Oil and Gas of Calgary was deciding whether it was safe to send in divers to fix the break.

"There is still a bit of a trickle," said Cara Tobin of the Alberta Energy Regulator.

"The break point is quite difficult to get at. The company is looking at getting some divers in."

Tobin said the leak near Turner Valley wasn't endangering public health.